According to data from the University of Pittsburgh, one in three children lacks consistent health insurance in this country. In a new study published in the journal Pediatrics, researchers found that 34 percent of children now are underinsured, an increase of 2.4 million kids compared to just three years earlier. The researchers found that the biggest change was an increase in high out-of-pocket expenses for health services. Such a trend is worrisome because these high costs and fees could force families to avoid seeking medical care for their children even when it is necessary.